Neighbours Brick garage?

[Rough Sawn]

Don't forget that some vines will attach themselves straight onto the brick wall via suckers pads.

Although the neighbours might not like it when there house becomes covered in ivy, so it would need to be kept under control.

[Rossluck]

Just do it mate, don't worry about all of the fuss. If you drill say 20 mm into the mortar then you're not doing anything that can't be reversed in ten minutes (pull out the screws and push some new mortar into the holes).

Just do it.